Chemistry · Science General

States of Matter

2,682 Questions

States of matter questions explore physical changes, evaporation, phase transitions, and the properties of liquids and gases. Topics cover density, cryosurgery, heavy water, and electrolytes. This foundational chemistry topic frequently appears in general science sections of SSC and railway exams.

Phase change mechanismsEvaporation and temperature effectsProperties of liquidsPhysical versus chemical changesElectrolytes and heavy water

States of Matter Questions

Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

Non - biodegradable substances are the one which_________________

  1. Do not degrade

  2. Degrades efficiently

  3. Degrades very slowly

  4. Remains unharmed
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Non-Biodegradable wastes are those that cannot break down or degrade for many years. These are waste that cannot change into manure and they pile up causing pollution. Burning these fuels causes more pollution in the environment. The non-biodegradable wastes become useful when they can be recycled.

So the correct option is 'Do not degrade'.

Multiple choice biology waste products reduce, recycle, reuse importance of the conservation of natural resources recycling

'volatile solids' represents

  1. Dissolved solids

  2. Organic Solids

  3. Colloidal Solids

  4. Suspended Solids
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Volatile solids are the portion of total solids that are driven off as gas during ignition at a specific temperature, typically 550 degrees Celsius. This fraction represents the organic matter present in the sample.

Multiple choice physics electric charges and fields conductors and insulators introduction to electrostatics electricity

An electrolyte is :

  1. a cell

  2. a metal

  3. a liquid that conducts electricity

  4. sugar
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Answer is C.
An Electrolyte is a substance that dissociates into ions in solution and acquires the capacity to conduct electricity. Sodium, potassium, chloride, calcium, and phosphate are examples of electrolytes, informally known as lytes. 
Therefore, it a liquid that conducts electricity.
Multiple choice chemistry p- block elements-ii hydrogen chloride chlorine - 17 group p-block elements

The boiling point of the hydrochloric acid varies with its concentration.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Physical properties of $HCl$ acid such as boiling point and melting points, density and pH depend upon the concentration or molarity of $HCl$ in the aqueous solution. They range from those of water at very low conc. approaching 0% $HCl$ to values for fuming $HCl$ over 40% $HCl$.

Multiple choice

MINERAL WATER IS A PURE CHEMICAL

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mineral water is a mixture containing water and dissolved minerals, not a pure chemical substance. A pure chemical substance consists of only one type of molecule or atom.

Multiple choice

In water cycle, evaporation is a process in which...

  1. water rises to the atmosphere as vapor and then condenses to form clouds

  2. Water goes back to ocean as water vapor

  3. Sun energy heats water vapor allowing it to rise to the atmosphere
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Evaporation is the process where liquid water absorbs thermal energy and turns into water vapor, rising into the atmosphere.

Multiple choice commercial studies waste generation and management e-waste management e-wastes waste generation

Finely divided solid, remaining either with in solution or in suspension is known as

  1. Settaleable Solids

  2. Dissolved Solids

  3. Suspended solids

  4. Colloidal Solids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Colloidal solids are particles that are finely divided and remain in suspension or solution due to their small size, preventing them from settling easily by gravity. Settlable solids settle quickly, while dissolved solids are in true solution.

Multiple choice evs mud and stones soil - formation and profile soil-nature soil profile

Humus is an example of

  1. Crystalloids

  2. Organic colloids

  3. Soil structure

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There are four major types of colloids present in soil :

1. Layer silicate clays 
2. Iron and aluminum oxide clays (sesquioxide clays) 
3. Allophane and associated amorphous clays 
4. Humus. 
Layer silicate clays, iron and aluminum oxide clays, allophane and associated amorphous clays are inorganic colloids while humus is an organic colloid.
Therefore, the correct answer is option B. 

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

Fill in the blanks by choosing an appropriate option.
When sugar is dissolved in water, it undergoes a (i) change but if sugar is heated in a test tube over the Bunsen burner flame, it first melts, turns brown and finally turns (ii). The new substance formed is __(iii)_ and the change is a _(iv)_ change.

  1. (i) - Physical reversible, (ii) - Black, (iii) - Charcoal, (iv) - Chemical irreversible

  2. (i) - Physical irreversible, (ii) - Black, (iii) - Coal, (iv) - Chemical irreversible

  3. (i) - Physical irreversible, (ii) - Red, (iii) - Charcoal, (iv) - Chemical reversible

  4. (i) - Physical reversible, (ii) - Red, (iii) - Coal, (iv) - Chemical reversible
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dissolving sugar in water is a physical, reversible change. When sugar is heated, it decomposes into carbon and water (chemical reversible change).

$C _{12}H _{22}O _{11} \rightarrow       C    +    H _2O$
                                                        Carbon        (Steam)
                                                   

Multiple choice common laboratory equipments common laboratory apparatus and equipments laboratory equipments know about some common gases chemistry

The phenomenon in which white transparent crystal changes into white powder is called :

  1. Deliquescence

  2. Efflorescence

  3. Allotropy

  4. Sublimation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Efflorescence is a phenomenon in which white transparent crystal changes into a white powder. Efflorescences can occur in natural and built environments. On porous construction materials it may present a cosmetic problem only, but can sometimes indicate serious structural weakness.